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4 changes: 2 additions & 2 deletions index.html
Original file line number Diff line number Diff line change
Expand Up @@ -38,8 +38,8 @@ <h1>JavaScript Quiz</h1>
<div class="content">
<div id="result"></div>
</div>
<!-- The below 'Restart Quiz' button is commented out because it is not used initially -->
<!-- <button id="restartButton" class="button-secondary">Restart Quiz</button> -->

<button id="restartButton" class="button-secondary">Restart Quiz</button>
</div>
</div>

Expand Down
73 changes: 65 additions & 8 deletions src/index.js
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ document.addEventListener("DOMContentLoaded", () => {
const resultContainer = document.querySelector("#result");



/************ SET VISIBILITY OF VIEWS ************/

// Show the quiz view (div#quizView) and hide the end view (div#endView)
Expand Down Expand Up @@ -42,7 +43,6 @@ document.addEventListener("DOMContentLoaded", () => {
// Shuffle the quiz questions
quiz.shuffleQuestions();


/************ SHOW INITIAL CONTENT ************/

// Convert the time remaining in seconds to minutes and seconds, and pad the numbers with zeros if needed
Expand All @@ -60,6 +60,18 @@ document.addEventListener("DOMContentLoaded", () => {
/************ TIMER ************/

let timer;
// Start the timer
function startTimer() {
timer = setInterval(() => {
quiz.timeRemaining--;
timeRemainingContainer.innerText = `${minutes}:${seconds}`;

if (quiz.timeRemaining <= 0) {
clearInterval(timer);
showResults();
}
}, 1000);
}


/************ EVENT LISTENERS ************/
Expand Down Expand Up @@ -91,30 +103,47 @@ document.addEventListener("DOMContentLoaded", () => {
const question = quiz.getQuestion();
// Shuffle the choices of the current question by calling the method 'shuffleChoices()' on the question object
question.shuffleChoices();
quiz.questions = quiz.questions.slice(0, 4);



// YOUR CODE HERE:
//
// 1. Show the question
// Update the inner text of the question container element and show the question text
questionContainer.innerText = question.text;


// 2. Update the green progress bar
// Update the green progress bar (div#progressBar) width so that it shows the percentage of questions answered

progressBar.style.width = `65%`; // This value is hardcoded as a placeholder
progressBar.style.width = `${quiz.currentQuestionIndex/quiz.questions.length*100}%`; // This value is hardcoded as a placeholder



// 3. Update the question count text
// Update the question count (div#questionCount) show the current question out of total questions

questionCount.innerText = `Question 1 of 10`; // This value is hardcoded as a placeholder
questionCount.innerText = `Question ${quiz.currentQuestionIndex+1} of ${quiz.questions.length}`; // This value is hardcoded as a placeholder



// 4. Create and display new radio input element with a label for each choice.
question.choices.forEach(choice => {
const input = document.createElement("input")
input.type = "radio"; // Set the type of the input to radio
input.name = "choice"; // Set the name of the input to choice
input.value = choice; // Set the value of the input to the choice text

const label = document.createElement("label"); // Create a new label element
label.innerText = choice; // Set the inner text of the label to the choice text

choiceContainer.appendChild(input); // Append the input to the choice container
choiceContainer.appendChild(label); // Append the label to the choice container
});



// Loop through the current question `choices`.
// For each choice create a new radio input with a label, and append it to the choice container.
// Each choice should be displayed as a radio input element with a label:
Expand All @@ -140,35 +169,63 @@ document.addEventListener("DOMContentLoaded", () => {
// YOUR CODE HERE:
//
// 1. Get all the choice elements. You can use the `document.querySelectorAll()` method.
const choiceElements = document.querySelectorAll("input[name='choice']");


// 2. Loop through all the choice elements and check which one is selected
choiceElements.forEach(choice => {
if (choice.checked) {
selectedAnswer = choice.value;
}

// Hint: Radio input elements have a property `.checked` (e.g., `element.checked`).
// When a radio input gets selected the `.checked` property will be set to true.
// You can use check which choice was selected by checking if the `.checked` property is true.


// 3. If an answer is selected (`selectedAnswer`), check if it is correct and move to the next question
if (selectedAnswer) {
const isCorrect = quiz.checkAnswer(selectedAnswer);
if (isCorrect) {
quiz.correctAnswers++;
}

// Move to the next question by calling the quiz method `moveToNextQuestion()`
quiz.moveToNextQuestion();

// Show the next question by calling the function `showQuestion()`
showQuestion();
}
// Check if selected answer is correct by calling the quiz method `checkAnswer()` with the selected answer.
// Move to the next question by calling the quiz method `moveToNextQuestion()`.
// Show the next question by calling the function `showQuestion()`.
}
})
};




function showResults() {


// YOUR CODE HERE:
//

// 1. Hide the quiz view (div#quizView)
quizView.style.display = "none";

// 2. Show the end view (div#endView)
endView.style.display = "flex";

// 3. Update the result container (div#result) inner text to show the number of correct answers out of total questions
resultContainer.innerText = `You scored 1 out of 1 correct answers!`; // This value is hardcoded as a placeholder
resultContainer.innerText = `You scored ${quiz.correctAnswers} out of ${quiz.questions.length} correct answers!`; // This value is hardcoded as a placeholder
}

const restartButton = document.querySelector("#restartButton");
restartButton.addEventListener("click", () => {
quiz.currentQuestionIndex = 0; // Reset the current question index
quiz.correctAnswers = 0;
endView.style.display = "none";
quizView.style.display = "block";
quiz.shuffleQuestions();
showQuestion(); // Show the first question again
});

});
17 changes: 13 additions & 4 deletions src/question.js
Original file line number Diff line number Diff line change
@@ -1,7 +1,16 @@
class Question {
// YOUR CODE HERE:
//
// 1. constructor (text, choices, answer, difficulty)
constructor(text, choices, answer, difficulty) {
this.text = text;
this.choices = choices;
this.answer = answer;
this.difficulty = difficulty;
}

shuffleChoices() {
for (let i = this.choices.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[this.choices[i], this.choices[j]] = [this.choices[j], this.choices[i]];
}
}

// 2. shuffleChoices()
}
53 changes: 44 additions & 9 deletions src/quiz.js
Original file line number Diff line number Diff line change
@@ -1,15 +1,50 @@
class Quiz {
// YOUR CODE HERE:
//
// 1. constructor (questions, timeLimit, timeRemaining)
constructor(questions, timeLimit, timeRemaining) {
this.questions = questions;
this.timeLimit = timeLimit;
this.timeRemaining = timeRemaining;
this.correctAnswers = 0;
this.currentQuestionIndex = 0;
}

// 2. getQuestion()

// 3. moveToNextQuestion()
getQuestion() {
return this.questions[this.currentQuestionIndex];
}

// 4. shuffleQuestions()
moveToNextQuestion() {
this.currentQuestionIndex++;
}

// 5. checkAnswer(answer)
shuffleQuestions() {
for (let i = this.questions.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[this.questions[i], this.questions[j]] = [this.questions[j], this.questions[i]];
}
}

// 6. hasEnded()
checkAnswer(answer) {
const currentQuestion = this.getQuestion();
if (currentQuestion.answer === answer) {
this.correctAnswers++;
return true;
}
return false;
}

hasEnded() {
return this.currentQuestionIndex >= this.questions.length;
}

filterQuestionsByDifficulty(difficulty) {
if (typeof difficulty !== 'number' || difficulty < 1 || difficulty > 3) {
return;
}
this.questions = this.questions.filter(question => question.difficulty === difficulty);
}


averageDifficulty() {
const totalDifficulty = this.questions.reduce((sum, question) => sum + question.difficulty, 0);
return totalDifficulty / this.questions.length;
}
}